#include <header.h>

int main(){
    //printf("123 \n");

    int fd = open("3.txt", O_RDWR);

    close(STDOUT_FILENO);

    int fd2 = dup(fd);

    printf("nihao\n");
    printf("zaima\n");
    printf("chilema\n");

    //fflush(stdout);


    //close(fd);
    //close(fd2);

    return 0;
}

